Note: This is an archival copy of Security Sun Alert 228529 as previously published on
Latest version of this security advisory is available from as Sun Alert 1017429.1.
Article ID : 1017429.1
Article Type : Sun Alerts (SURE)
Last reviewed : 2010-01-19
Audience : PUBLIC
Copyright Notice: Copyright © 2010, Oracle Corporation and/or its affiliates.

Sun Linux 5.0 Security Vulnerabilities in XFree86 Packages


Release Phase

Bug Id

Date of Resolved Release

Vulnerabilities in XFree86 packages ...

1. Impact

Vulnerabilities in XFree86 packages may allow local or remote unauthorized users the ability to do the following:

1. xterm(1), provided as part of the XFree86 packages, provides an escape sequence for reporting the current window title. This escape sequence takes the current title and places it directly on the command line. An unauthorized local or remote user can create an escape sequence that sets the Xterm window title to an arbitrary command, and then reports it to the command line. Since it is not possible to embed a carriage return into the window title, the unauthorized user would then have to convince the user to press Enter for the shell to process the title as a command.

2. It is possible for a local or remote unauthorized user to lock up xterm(1) by sending an invalid "DEC UDK" escape sequence.

3. The xdm(1) display manager, with the "authComplain" set to false, allows unauthorized local or remote users to connect to the X server if the xdm(1) auth directory does not exist. (Reference the xdm manpages for the default values of authComplain and auth directory.)

4. A vulnerability in the "MIT-SHM" extension of the X server may allow local users to read and write shared memory.

5. The X server may set the "/dev/dri" directory permissions incorrectly. Since the "/dev/dri" is under the root filesystem and has world write permissions, local unprivileged users can create files in the root filesystem.

Please see the following CVE issues for more details:

2. Contributing Factors

This issue can occur in the following releases:

Sun Linux

  • Sun Linux 5.0 (LX50) with XFree86 packages prior to XFree86-4.1.0-49

3. Symptoms

Should the described issue occur, the following issues may be seen:

1. Xterm may lock up

2. "/dev/dri" access permissions show world writable

Note: The above are only predictable symptoms.

4. Workaround

There is no workaround. Please see the "Resolution" section below.

5. Resolution

These issues are addressed in the following packages:

Sun Linux 5.0

  • XFree86-100dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-4.1.0-49.i386.rpm
  • XFree86-75dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-ISO8859-15-100dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-ISO8859-15-75dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-ISO8859-2-100dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-ISO8859-2-75dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-ISO8859-9-100dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-ISO8859-9-75dpi-fonts-4.1.0-49.i386.rpm
  • XFree86-Xnest-4.1.0-49.i386.rpm
  • XFree86-Xvfb-4.1.0-49.i386.rpm
  • XFree86-cyrillic-fonts-4.1.0-49.i386.rpm
  • XFree86-devel-4.1.0-49.i386.rpm
  • XFree86-doc-4.1.0-49.i386.rpm
  • XFree86-libs-4.1.0-49.i386.rpm
  • XFree86-tools-4.1.0-49.i386.rpm
  • XFree86-twm-4.1.0-49.i386.rpm
  • XFree86-xdm-4.1.0-49.i386.rpm
  • XFree86-xf86cfg-4.1.0-49.i386.rpm
  • XFree86-xfs-4.1.0-49.i386.rpm


  • XFree86-4.1.0-49.src.rpm

The above XFree86 packages for Sun Linux 5.0 and SRPM are available at:

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Sun Linux 5.0

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